Several infections of the cardiovascular system can be identi?ed by inspecting a stained blood smear in the microscope. For the following infections, identify the microscope observation that does not ?t the disease.

A) Chagas disease; protozoan visible among blood cells
B) Epstein-Barr virus; virus visible inside red blood cells
C) Babesiosis; protozoan visible inside red blood cells
D) Malaria; ring trophozoites visible inside red blood cells